Sofia to Kolkata (Calcutta): time difference
Kolkata (Calcutta) is 2 h 30 min ahead of Sofia. Live clocks for both, the working hours they share, and how each one sits against your own time.
🇮🇳 Kolkata (Calcutta), India
40
- India Standard Time
- UTC+5:30
- Daytime
☀️ 05:32 · 🌙 17:17 · 11 h 46 min
+2 h 30 min
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Sofia 07:02 7:02 AM Kolkata (Calcutta) 09:32 9:32 AM You –:–
07:02 7:02 AM
Eastern European Summer Time · UTC+3
☀️ 07:34 · 🌙 18:55
09:32 9:32 AM
India Standard Time · UTC+5:30
☀️ 05:32 · 🌙 17:17
·
+2 h 30 min
Kolkata (Calcutta) is 2 h 30 min ahead of Sofia.
When you, Sofia and Kolkata (Calcutta) are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇧🇬 Sofia
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇮🇳 Kolkata (Calcutta)
2:30 2:30 AM 3:30 3:30 AM 4:30 4:30 AM 5:30 5:30 AM 6:30 6:30 AM 7:30 7:30 AM 8:30 8:30 AM 9:30 9:30 AM 10:30 10:30 AM 11:30 11:30 AM 12:30 12:30 PM 13:30 1:30 PM 14:30 2:30 PM 15:30 3:30 PM 16:30 4:30 PM 17:30 5:30 PM 18:30 6:30 PM 19:30 7:30 PM 20:30 8:30 PM 21:30 9:30 PM 22:30 10:30 PM 23:30 11:30 PM 0:30 12:30 AM 1:30 1:30 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇧🇬 Sofia | 🇮🇳 Kolkata (Calcutta) |
|---|---|---|
| Local time | 07:02 | 09:32 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Eastern European Summer Time | India Standard Time |
| UTC offset | UTC+3 | UTC+5:30 |
| Offset from Sofia | — | +2 h 30 min |
| IANA zone | Europe/Sofia | Asia/Kolkata |
| Daylight saving | On summer time → UTC+2, Oct 25, 03:00 | Not observed |
| Sunrise | 07:34 | 05:32 |
| Sunset | 18:55 | 17:17 |
| Daylight | 11 h 20 min | 11 h 46 min |
| People on this clock | 1,286,383 | 4,486,679 |
Compare Sofia with another city
More comparisons with Sofia: the time zones next to it and the far side of the clock.
Big time differences
Sofia and Kolkata (Calcutta): common questions
How many hours ahead of Sofia is Kolkata (Calcutta)?
The clocks in Kolkata are 2 hours and 30 minutes ahead of those in Sofia (UTC+5:30 and UTC+3).
If it is 9:00 AM in Sofia, what time is it in Kolkata (Calcutta)?
At 9:00 AM in Sofia, clocks in Kolkata show 11:30 AM.
What time is it in Kolkata (Calcutta) at the end of the working day in Sofia?
The working day in Sofia ends at 6:00 PM; in Kolkata it is 8:30 PM at that moment.
Is there a time when both Sofia and Kolkata (Calcutta) are at work?
Yes: from 9:00 AM to 3:30 PM in Sofia (11:30 AM to 6:00 PM in Kolkata), the working days (9:00 AM–6:00 PM) overlap.
From what time in Sofia is it tomorrow in Kolkata (Calcutta)?
Once it is 9:30 PM in Sofia, the date in Kolkata has already changed. Until 2:30 AM in Kolkata, it is still the previous day in Sofia.
Does the time gap between Sofia and Kolkata (Calcutta) change during the year?
Yes – daylight saving time is used in Sofia but not in Kolkata. From October 25, 2026, Kolkata will be 3 hours and 30 minutes ahead of Sofia.
